Map.prototype.delete()

The delete() method removes the specified element from a Map object by key.

myMap.delete(key);

key

The key of the element to remove from the Map object.

true if an element in the Map object existed and has been removed, or false if the element does not exist.

var myMap = new Map();
myMap.set('bar', 'foo');

myMap.delete('bar'); // Returns true. Successfully removed.
myMap.has('bar');    // Returns false. The "bar" element is no longer present.

• Map